Oh and aside from Saltillos, slate may be the dirtiest tile to work with.
Think, petrified dirt
I use a "water proof" booth. I place the saw stand in a large plastic tub and make a three sided frame wrapped in clear plastic.
Total containment. I will sometimes protect the floor and work indoors.
Maybe I sholud take I picture of my booth before I break the saw down tomorrow.
KT